This is something I've been kicking around lately after playing with the new shield swipe. It's a marginal dps increase while MTing that pld needed which is greatly appreciated and I had the thought of maybe giving it some more synergy with other abilities.
So what I'm proposing is a simple enough thing, have sheltron reset the CD on swipe each time you use it and during Bulwark have the CD reduced or removed. Bulwark and Sheltron are supposed to be the shield block cooldowns after all, I feel as though they should have more interaction with shield swipe.